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Handbook of Sustainable Design of Digital Services

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Backend    ODD#12     ODD#13    

Are EXPLAIN clauses used on "Slow queries" to optimize indexes ?

Advice 

Data

C People

A Planet

B Prosperity

Difficulty

N/A

Priority

/

Récurrence

/

Tests

Are the criteria for identifying a slow query clearly defined?

Precisions

Most DBMS engines have a supervision mode as standard which allows the identification of the most resource-intensive actions. Some DBMS provide methods for investigating processes identified as "heavy". This helps to identify areas for improvement to reduce the time and cost of operations.

Additional elements

Rule for assessing the level of compliance of the criterion

0 / 0

Life cycle

Réalisation

19 other criteria related to the recommendation: Reduce the impact of data from its storage and access

Recommendation Essential

Data

Is the number of requests kept to a minimum (no looping) ?

Advice

Data

Are the slow query detection thresholds set effectively ?

Advice

Data processing

Does regulated data (personal, health, financial) comply with the recommendations for structuring these categories of data ?

Recommendation

security

Is sensitive user data secure ?

Recommendation

Data processing

Does the API provide limits, filters and the list of fields to return ?

Recommendation

Data processing

Is the data collected really useful ?

Recommendation

Data processing

Is sensitive data collected ?

Recommendation

Data processing

Does the data have an expiration date when it is deleted ?

Recommendation

Data

Are data replications between multiple Database Engine (Cluster) instances appropriate for sensitivity and availability requirement ?

Recommendation

Data

Is frequently accessed data available in RAM ?

Recommendation

Data

Are "live" and "dead" data handled differently (eg: Slow storage for "dead" data) ?

Advice

Data

Have the different data access solutions (queries, triggers, stored procedures) been tested ?

Advice

Data

Is a NoSql solution more efficient than its relational equivalent ?

Advice

Data

Is an alternative to the relational model being considered ?

Recommendation

Data

Are database indexes consistent with operations ?

Recommendation

Data

Is the removal of obsolete data being managed ?

Advice

Data

Can data be backed up incrementally ?

Recommendation

Data

Do implemented queries use joins rather than multiple queries ?

Advice

Data

Is an alternative to SQL queries used when possible (local storage or similar) ?